Alg. Ii 4.7 Notes Nov. 13
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ex: x2 = 5x + 6
x2 - 5x + 6 = 0 Quadratic equation-y = ax2 + bx + c
--
ex: 3 is a root of x2 - 5x + 6 = 0 b/c 32 - 5(3) + 6 = 0.
• AKA "zeros" -- the value of the variable makes the polynomial = 0. • the x-intercepts
ab = 0 if and only if a = 0 or b = 0 or both • can be extended to any number of factors
Nov 101:45 PM
1
1. Write equation as polynomial = 0.
2. Factor completely.
3. Set each factor = 0 and solve.
g(y) = y2 - 16
Assignment: pg. 196 oral exercises #5, 7, 9 pg. 196197 written exercises #327 multiples of 3, and #36 Nov 102:10 PM
2
x2 - 5x + 6 = 0 Quadratic equation-y = ax2 + bx + c
--
ex: 3 is a root of x2 - 5x + 6 = 0 b/c 32 - 5(3) + 6 = 0.
• AKA "zeros" -- the value of the variable makes the polynomial = 0. • the x-intercepts
ab = 0 if and only if a = 0 or b = 0 or both • can be extended to any number of factors
Nov 101:45 PM
1
1. Write equation as polynomial = 0.
2. Factor completely.
3. Set each factor = 0 and solve.
g(y) = y2 - 16
Assignment: pg. 196 oral exercises #5, 7, 9 pg. 196197 written exercises #327 multiples of 3, and #36 Nov 102:10 PM
2
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